Heater.



G. L. FOGLER.

HEATER.

I APPLICATION FILED APR. 8, 1908. 14 409 Patented Mar. 9, 1909.

2 SHEETS-SHEET 1.

EMVENTURD G.L.F OGLER. HEATER.

APPLICATION FILED APR. 8, 1908.

Patented Mar. 9, 1909.

2 SHEETS-SHEET 2.

WiggNF/i SES. I a @165:

Fla 3 QNVENTOR.

x No. 914,402.

-UNITED STATES PATENT OFFICE.

GEORGE L. FOGLER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO FOGLER FURNACE COM- PANY, OF TACOMA, WASHINGTON, A CORPORATION OF WASHINGTON.

. HEATER.

Patented March 9, 1909.

Application illell April 8, 1908. Serial No. 426,8.

water or steam heating systems for dwellings and the like, in which the water is either heated for circulation through the system, or converted into steam of low pressure for circulation through the system.

The object of the invention is to provide a heater for the purpose specified having a greater efficiency for the quantity of fuel consumed than prior "heaters of a similar character. I

The invention comprises the construction and arran ement of parts hereinafter described an claimed.

In the accompanying drawing Figure 1 is a vertical section through a heater embodying my invention; Fi 2 is a horizontal section on the line 22, Fig. 1; and Fig. 3 is a vertical transverse section taken on the line 3-3, Fig. 2.

The heater shown is of the sectional boiler type, being composed of a series of vertical sections 1, 2, 3, 4, 5, 6 and 7 These sections are lpreferably castings according to the usua way of constructing these heaters, being provided with the water circulating spaces 8 and having the several sections connected to provide for the circulation of water therethrough either by sleeves or nipples 9, or by manifolds on the outside. The supply 0 ening or openings are rovided at 10 in t e top of the sections an the return openings at 11 near the bottoms of the sections. The manner of connectin these parts and their manner of operation is well understood by those skilled in the art. The front of the heater is a water wall. 12 and the rear is a similar water wall 13, the s aces of these walls communicatingv with t e circulation s aces of the sections 1, 2, 3, 4, 5, 6 and 7.

eretofore in heatersof this kind the fire box or chamber has extended through all of v the sections of the heater, but withmy improved heater only a portion of the sections are formed to provide the fire box. As shown, the front three sections 1, 2 and 3 are so formed as to provide therein the fire box 15, said sectionsbein the crown portions 16 and legs 17 forming the tops and sidesof the fire box, the front of said box bein formed by the water wall 12 through whic is the feed door 18, and the rear being formed by the section 4. The bottom of the fire box is provided with the grate 20 beneath which is the ash it 21 formed by the legs of the sections. T e ash pit is provided with an ash removing door 23 which is arranged to be sealed tightly.

The sections to the. rear of the fire box, namely, 4 and 5, are provided with openings 25 which communicate with the upper portion of the fire box and which are preferably tapered rearwardly, as shown, while the next section, 6, (or series of-sections,' if a greater number are used) is provided with an opening 26 of greater area than the openings 25, so as to provide an expansion or combustion chamber. The section 7, or the one which is next to the rear water wall 13,

is provided with a chamber 27 which, at its where they communicate with a verticalspace 29 which in turn communicates with one or more openings 30 formed in the sections and being in alinement to form return flues which at their rear ends are shown communicating with the outlet 31' for the smoke pipe. As many openings formi flues 28 and 30 as are desired maybe provide and they may be made to pass back and forth as many times as necessary to cause the complete absorption of the heat from the ases. y

A nozzle 33 is connected to the rear wall of the fire box section. 3, preferably by casting integral with said section, and-projects into the openings 25. This nozzle, as well as the opemngs 25 maybe of any desired shape in cross section, preferably oblon with the long axis horizontal, as shown. he section 4 is provided withfthe horizontal openings 35 leading from the outside where they communicate with. the-atmosphere to the opening the fire box.

v soon as it is struc -'-by the hot gases, it ex- .the opening 35 and through the perfopreferably being integral therewith, and fills the space between the nozzle and the opening 25. Extendingth-rough the section 5, by being cast there n, 1s a horizontally arranged pipe 37 which at its ends 1s open to the atmosphere outslde the heater and 1ns1de of the opening 25 is provided with perforations38.

The nozzle 33, together with the funnel formed by the tapering opemng 25, which communicates through passages 35 to the atmosphere, form an in ector burner. The products of combustion from the fire box pass through the nozzle 33 and act on the principle of an injector to draw air 1n through rated plate 36 and also acting to draw in air through the perforated pipe 37. The fire box has a materially sma er grate area than fire boxes heretofore used in such heaters and is also of relatively greater depth. The fuel is lpreferably bituminous, or other volatile coa and is maintained in the fire box in a comparatively deep body and is only slowly burned therein, due to the fact that the draft opening can be practically sealed. In this fire box the fuel is merely volatilized, or converted into a gas, that is, the products of combustion from the glowing layer over the grate pass u through the deep body of fuel and enrich t emselves in the usual way of gasproducers. The gaseous roducts formed in this chamber, while still at the high heat of their production, pass through the nozzle '33 and by their injector action draw in air through the o enings 35, ,Which air mingles partly with t e gas and also forms an enve op around, the same, and also draw in further air through the perforated ipe 37, which latter air is introduced direct y mto the stream of as,'breaking the same up. The mixture is hurnedat the end of the openings 25, that is, in the enlarged combustion chamber 26. The hot gases ass up through the vertical chamber 37 an back and forth through the fiues 28 and 30. The quantity of air drawn in is automatically regulated and is in roportion to the uantity of gas roduce in bviously, i a arge uantity of gas is produced, it passes throug the nozzle 33 at a high velocity, drawing in a comparatively large amount of 'air; while with a lesser production of gas its velocity through the nozzle is'decreased, drawing in a lesser quantity of air. In this way the amount of air is exactly pro ortioned automatically to the amount 0 gas produced. Theair comes in ractically cold so that as pandsmany times in volume, opening up the stream of gas and caus ng complete combustion of such gases. The consequence is that the device is very efiicient, giving a lar e quantity of heat units for the amount of -uel consumed.

The combined cross sectional areas of the fiues 28 is less than the cross sectional areapf the small end of the sleeve 37. This provides at the end of the combustion chamber a point at which the flue area is somewhat restricted, so that it serves to choke back the gases and prevents the draft of the chimney or stack from extending back to. the nozzle or burner. The consequence is that the gas coming through the nozzle 33 is not affected by the suction of the stack and therefore acts under its normal pressure of production on the principle of an injector to draw, in just the right quantity of air? The consequence is that the quantity of air entering and the pressure and velocity thereof is automatically regulated by the gas so that at all times, no matter what the quantity of gas being produeed may be, practically perfect combustion is insured. This could not be the case if the suction from the stack extended back to the nozzle to its full force, since under those .conditions the stack suction would have the effect of drawing in a greater quantity of air when a small uantity of gas was being produced than w en a larger quantity of gas is produced.

The heater described being of the sectional type can be enlarged in size as desired. If

desired, the fire box can be enlarged by adding one or more sections similar to those marked 1 and 2, while for increasing the generating capacity of thGhGatGL SGClLIOIIS s1milar to 6 are added. Also, if desired, the openings 25 ma T be made to extend through t ree or more 0 the sections, but usually two sections for this purpose are sufficient.

What I claim is:

1. A heater for water and steam heating systems com rising a plurality of hollow sections provi ing water circulating spaces, some of said sections having alinmg openings therethrough from front to rear, the fora ward one of sa1d last'named sections having an opening connecting its opening with the atmos here, and a nozzle communicatin with t e fire box and projecting into said alinin openings.

2. g heater for water and steam heating systems com rising a plurality of hollow sections rovi ing water circulating spaces, some 0 said sections having alining openings therethrough from the front to the rear, the forward one of said lastnamed sections having an opening connecting its opening with the atmos here, a nozzle coinmunicatin with the fi i'e box and projecting into sai alining openings, and a perforated pipe in the next adjacent section in front of said nozzle and having its end extending through the section an open to the atmosphere.-

3. A heater for water and steam heating tions systems com rising a plurality of hollow secrovi ing Water circulating spaces, some 0 said sections having alining o enings therethrough from front to rear, the fibrward one'of the last named sections having an opening connecting its opening with the atmosphere, a nozzle communicating with the fire ox and projecting into said alining openings, and return fiues formed in the upper art of said sections by alining sleeved openmgs therethrongh.

4. A heater for water and steam heating systems comprising a plurality of hollow sections providing water circulating spaces, certain of said sections being provided with openings to provide a fire box, the sections to e 'rear of the fire box sections being provided with alining openings therethrough from their front to their rear faces and one of them having an opening extending from its opening to the exterior, and a nozzle on the rearmost fire box section and rojectin into said alining opening beyond t e air et.

5. A heater for Water and steam heating systems com rising a plurality of hollow sections provi ing water circulatin spaces, some of said sections being provided with openings to form a fire box, the sections immediately adjacent to the fire box sections being rovided with alining openings therethroug from their front to their rear faces, and one of said sections having an opening leading from its opening to the exterior, the sections to therear of said last named sections being provided with enlarged openin s to form a combustion chamber, and a nozz e on the rearmost fire box section and projectinto the adjacent opening beyond the air et.

6. A heater for water and steam heating systems com rising a plurality of hollow sections provi ing water circulating spaces, some of said sections having alined o enings therethrou h from front to rear, the orward one of sai last named sections having an opening connecting its opening with the atmosphere, a-nozzle communicating with the fire box and projecting into sald alinin openings, and other 0 er'rings through sai sections forming flues o lesser cross sectional area than the openings into which the nozzle projects.

a 7. A heater for water and steam heating s stems comdpurlising a plurality of hollowsections provi g water circulating spaces, some of said sections having alined o enings therethrou h from front to rear, the orward one of sai last named sections having an opening connecting its open ng with the atmosphere, a nozzle commumcatmg with the fire box and projecting into said alining openings, the sections to the rear of said last named sections being provided with enlarged o enings to form a combustion chamber, and other openin s through said sections forming flues of esser cross sectional area than the openings into which the nozzle projects.

In testimony whereof, I the said GEORGE L. FOGLER have hereunto set 111 hand.

GEORGE L. OGLER.

Witnesses: I i

F. W. WINTER, WM. A. STEINMEYER. 

